Equipment unit · VIN-decoded · NHTSA vPIC

2021 Stoughton Trailers

1DW1A5322MSA46156 · Trailer · TRAILER
Carriers run under1
20 mo
Inspections11
all-time
OOS inspections1
of 11
First seenJun 30, 2024
MD
Last seenFeb 17, 2026
AL
01

Decoded identity

From the 17-character VIN via NHTSA vPIC

VIN
1DW1A5322MSA46156
Make
Stoughton Trailers
Model
Stoughton Trailers
Model year
2021
Body class
Trailer
Vehicle type
TRAILER
GVWR
Not decoded
Decoded at
Jun 16, 2026
vPIC returns make / model / year / body class / GVWR. Fields it does not resolve are shown as Not decoded rather than guessed.
Decode evidence & sources

Deterministic structure

These fields come directly from VIN positions and the published checksum calculation, with zero store IO.

World manufacturer identifier
1DW

Deterministic · VIN positions 1–3.

Vehicle descriptor section
1A532

Deterministic · VIN positions 4–8.

Check digit
2 · valid

Deterministic · position 9; calculated value 2.

Model year candidates
1991 or 2021

Position 10 repeats every 30 years; both candidates are retained and neither is silently selected.

North American serial sequence
A46156

Deterministic · positions 12–17 for a North American WMI.

Sourced platform inference

The prefix store publishes only at support ≥ 3 and purity ≥ 90%. Prefix confidence is shown beside every established platform claim.

Make
STOUGHTON TRAILERS

Prefix basis · 12,945 decoded VINs at 100.0% prefix purity.

Model
Stoughton Trailers

Prefix basis · 12,945 decoded VINs at 100.0% prefix purity.

Model line
Not established

No sourced model-line label is established.

No source established for this field.

Generation
Not established

No sourced generation label is established.

No source established for this field.

Cab type
Not established

No sourced cab label is established.

No source established for this field.

Federal observation (NHTSA vPIC)

What the federal corpus observed directly for this exact VIN — independent of, and sometimes more specific than, the prefix-level inference above.

Observed model year
2021

Observed directly for this VIN via NHTSA vPIC.

Observed make
STOUGHTON TRAILERS

Observed directly for this VIN via NHTSA vPIC.

Observed model
Stoughton Trailers

Observed directly for this VIN via NHTSA vPIC.

Observed body class
Trailer

Observed directly for this VIN via NHTSA vPIC.

Observed vehicle type
TRAILER

Observed directly for this VIN via NHTSA vPIC.

GVWR
Not established

Observed directly for this VIN via NHTSA vPIC.

Not established

  • model line
  • generation
  • cab type

These are withheld claims, not negative findings.

02

Inspection history

Every roadside inspection of this VIN, newest first · Jun 30, 2024 – Feb 17, 2026

DateStateLevelViol.OOSCarrier (DOT)Plate
Feb 17, 2026ALIII · Driver-only1AMPRO VENTURES INC 3179844963971ST/IL
Oct 30, 2025KYIII · Driver-only0AMPRO VENTURES INC 3179844963971ST/IL
Sep 9, 2025SCIII · Driver-only0AMPRO VENTURES INC 3179844P63971ST/IL
Jul 23, 2025NCII · Walk-around0AMPRO VENTURES INC 3179844963971/IL
Jul 17, 2025ARIII · Driver-only0AMPRO VENTURES INC 3179844963971ST/IL
May 6, 2025MSIII · Driver-only0AMPRO VENTURES INC 3179844963971ST/IL
Mar 26, 2025SCIII · Driver-only1AMPRO VENTURES INC 3179844963971ST/IL
Mar 20, 2025OHII · Walk-around5OOSAMPRO VENTURES INC 3179844963971ST/IL
Jan 30, 2025ILIII · Driver-only1AMPRO VENTURES INC 3179844963971ST/IL
Dec 19, 2024MDII · Walk-around1AMPRO VENTURES INC 3179844963971/IL
Jun 30, 2024MDIII · Driver-only0AMPRO VENTURES INC 3179844963971ST/IL
03

Carriers this unit has run under

1 distinct carrier · grouped by DOT · newest activity first

CarrierDOTFirst seenLast seenInsp.State
AMPRO VENTURES INC3179844Jun 30, 2024Feb 17, 202611IL
Names are left-joined from the FMCSA census; a DOT with no census match falls back to its number.
04

Plate & unit-number history

The same truck under different plate registrations across carriers

PlateState / prov.Unit no.CarrierDate rangeInsp.
963971STILAMPRO VENTURES INCJun 30, 2024Feb 17, 20268
P63971STILAMPRO VENTURES INCSep 9, 2025Sep 9, 20251
963971ILAMPRO VENTURES INCDec 19, 2024Jul 23, 20252
Sources: FMCSA SAFER · L&I · NHTSA vPIC · decoded Jun 16, 2026